Evaluation of the effects of changing to continuous access HOT lanes on SR 167 : WSDOT research report.
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2016-02-01
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Abstract:In August 2014, The Washington State Department of Transportation (WSDOT) changed the access
controls for the HOT (High Occupancy Toll) lanes on State Route (SR) 167. The lanes were initially designed
and implemented to allow access at only six points northbound and four points southbound. Since August 23,
2014, free access has been allowed into and out of the HOT lanes. This study was performed to determine the
effects of allowing continuous access to the SR 167 HOT lanes. It examined customer attitudes toward the new
access rules, the performance of the corridor, including both the HOT lanes and the parallel general purpose
(GP) lanes, and the volumes of use and travel times experienced. It also examined the amount of revenue
collected, the amount of toll evasion occurring, collision frequency and severity, and the impacts on transit
operations.
The changes in the corridor since the change in access rules have been complex. This report describes
that complexity. In general, traffic volumes are increasing in the corridor. Travel times have degraded slightly
in both the GP and HOT lanes in the corridor. Prices and total revenue are up in the HOT lane. Prices
increased substantially during the first five months of operation of the new rules, declined somewhat after that,
but remain higher than under access control rules. No statistically significant change in safety is apparent. A
large fraction of the travelers in the corridor are in favor of the access rule changes, and that includes the transit
agencies operating in the corridor.
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